{"id":"CVE-2021-34430","aliases":["EUVD-2021-21086","GHSA-ffg3-3xwj-f92r"],"status":"published","title":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it...","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01045,"percentile":0.64605,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-326","CWE-338"],"published":"2021-07-08T03:00:10Z","modified":"2026-10-24T10:30:37Z","products":[{"vendor":"eclipse","product":"tinydtls"},{"vendor":"the eclipse foundation","product":"eclipse tinydtls"}],"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=568803","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34430"},{"url":"https://github.com/advisories/GHSA-ffg3-3xwj-f92r"}],"sources":{"cve":[{"id":"CVE-2021-34430","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","status":"published","published":"2021-07-08T03:00:10Z","modified":"2024-08-04T00:12:50.067Z","cwes":["CWE-338"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21086","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","status":"published","published":"2021-07-08T03:00:10Z","modified":"2024-08-04T00:12:50Z","updated_at":"2026-11-03T03:24:32.445199Z"}],"ghsa":[{"id":"GHSA-ffg3-3xwj-f92r","title":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it...","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","status":"published","published":"2022-05-24T19:07:18Z","modified":"2023-01-30T05:00:39Z","cwes":["CWE-326"],"updated_at":"2026-11-02T14:46:14.926249Z"}],"nvd":[{"id":"CVE-2021-34430","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","status":"published","published":"2021-07-08T03:15:07.643Z","modified":"2026-06-17T03:55:51.227Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-338","CWE-326"],"updated_at":"2026-11-02T14:06:55.259633Z"}],"osv":[{"id":"CVE-2021-34430","description":"Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.","status":"published","published":"2021-07-08T03:15:07.643Z","modified":"2026-10-24T10:30:37.332535394Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:20.13324Z"}]}}